clk: add support for clk_is_match()

Add support for clk_is_match() which is required to
know if two clock pointers point to the same exact
physical clock.

Also add a unit test for the new API.

Reviewed-by: Lokesh Vutla <lokeshvutla@ti.com>
Signed-off-by: Sekhar Nori <nsekhar@ti.com>

1 files changed, 12 insertions, 0 deletions

diff --git a/include/clk.h b/include/clk.h
index 2ebc905e04b..3ca2796b577 100644
--- a/include/clk.h
+++ b/include/clk.h
@@ -333,6 +333,18 @@ int clk_disable(struct clk *clk);
  */
 int clk_disable_bulk(struct clk_bulk *bulk);
 
+/**
+ * clk_is_match - check if two clk's point to the same hardware clock
+ * @p: clk compared against q
+ * @q: clk compared against p
+ *
+ * Returns true if the two struct clk pointers both point to the same hardware
+ * clock node.
+ *
+ * Returns false otherwise. Note that two NULL clks are treated as matching.
+ */
+bool clk_is_match(const struct clk *p, const struct clk *q);
+
 int soc_clk_dump(void);
 
 /**